Using E-Commerce on WordPress

I'm a web design student and received an offer from a client who wants me to create a groupon/like site. The problem is that I haven't learned PHP/database yet. I was doing some research and found out that WordPress has e-commerce plug-ins with groupon/like scripts.

I was wondering if I can create the front-end of the website(attractiveness/user-friendly part) and then transfer to someone and have them use WordPress to create the back-end(e-commerce).

I want to use my client's website for my final project in my class, but I need to use HTML5, CSS3, and JavaScript. I read on a forum that WordPress doesn't support JavaScript. Is it possible to still integrate the website here and still have the groupon-like effects?

Hello there,
You have posted to the support forums that are only for free hosted WordPress.com bloggers. You not have a blog linked to your username and you did not provide a link to ths blog in question starting with http:// so please read this first WordPress.com vs WordPress.org: The Differences

If you require advertising, affiliate links, e-commerce/shopping cart functionality, there are no restrictions on e-commerce if you setup a self-hosted WordPress.org blog instead of a free hosted WordPress.com blog.

for my final project in my class, but I need to use HTML5, CSS3, and JavaScript.

Means in addition to what @TT said above you can't modify the code on WordPress.COM - so you will not be able to meet your instructors requirements for your class. You can do what you want to do if you have a .ORG install.